package com.guangwei.arithmetictest;

import android.content.Context;
import android.speech.tts.TextToSpeech;
import android.util.Log;

import java.util.Locale;

public class SystemTTS {
    private static final String TAG = "SystemTTS";
    private static SystemTTS instance;
    private TextToSpeech textToSpeech;
    private boolean isSupport = true;

    private SystemTTS(Context context) {
        textToSpeech = new TextToSpeech(context, new TextToSpeech.OnInitListener() {
            @Override
            public void onInit(int status) {
                if (status == TextToSpeech.SUCCESS) {
                    int result = textToSpeech.setLanguage(Locale.CHINA);
                    textToSpeech.setPitch(1.0f); // 设置音调
                    textToSpeech.setSpeechRate(1.0f); // 设置语速
                    if (result == TextToSpeech.LANG_MISSING_DATA || result == TextToSpeech.LANG_NOT_SUPPORTED) {
                        isSupport = false;
                        Log.i(TAG, "系统不支持中文语音播报");
                    }

                    if (!isSupport && textToSpeech != null) {
                        textToSpeech.speak("", TextToSpeech.QUEUE_FLUSH, null);
                    }
                }
            }
        });
    }

    public static SystemTTS getInstance(Context context) {
        if (instance == null) {
            instance = new SystemTTS(context);
        }
        return instance;
    }

    public void speak(String text) {
        if (!isSupport) {
            return;
        }
        if (textToSpeech != null) {
            textToSpeech.speak(text, TextToSpeech.QUEUE_ADD, null);
        }
    }

    public void destroy() {
        if (textToSpeech != null) {
            textToSpeech.stop();
            textToSpeech.shutdown();
        }
        instance = null;
    }
}
